Dental prophylactic device



FIG. 1 is a perspective view of a dental prophylactic device, showing my new design;

FIG. 2 is a top plan view thereof, shown on a reduced scale;

FIG. 3 is a side elevational view thereof, shown on a reduced scale;

FIG. 4 is a bottom plan view thereof, shown on a reduced scale;

FIG. 5 is a front end elevational view thereof, shown on a reduced scale;

FIG. 6 is a rear end elevational view thereof, shown on a reduced scale. 

The ornamental design for a dental prophylactic device, substantially as shown and described. 